(CNN) - U.S. Secret Service Director Mark Sullivan will step down this month, concluding a long career that was clouded last year by a scandal at the agency involving agents and prostitutes ahead of a presidential summit in Colombia.

Spokesman Brian Leary said on Friday that Sullivan would retire on February 22 after leading the agency that protects presidents and fights financial crime since 2006. He's been an agent for 30 years.

(CNN) – A Secret Service dog fell to its death Saturday night while doing a sweep of a multi-story parking deck near a hotel where Vice President Joe Biden was speaking.

The Belgian Malinois fell from the roof of the six-story deck adjacent to The Ritz-Carlton in New Orleans where Biden was speaking at a fundraiser for U.S. Senator Mary Landrieu, reported CNN affiliate WWL.